I logged in and checked out the theme. You are currently running version 1.0.
Here is the link to download the latest version http://www.themely.com/download/integral.zip
Make sure to unzip that file before uploading.
Inside the contents of the folder is the theme files for you to upload.
Follow these instructions to upgrade http://support.themely.com/knowledgebase/how-to-update-or-upgrade-your-theme/